The project is Tesla Amazing: https://www.kickstarter.com/projects/teslaamazing/magnetic-paper-that-sticks-to-walls/description If you know where to find this kind of plastic, please share!
Based on what I can see, it appears to be BOPP film. I have used this film in food label applications where a durable waterproof material is required. We routinely had issues with the static properties of this material. I would look at samples of this material and compare it to the material Tesla Amazing is using.